Type 4, 1700cc engine rebuild for a bus, what to do, suggestions

[Ceckert64]

Thanks for the replies Clatter! I need to stop by the engine shop soon, this engine is on the back burner for now. I’m finishing up my bug to sell and that currently has priority. But I did score some super solid bus heater boxes for $40 at a VW show along with some real Weber 44 IDFs that came off a running Baja bug for $220. Will the 44s be too big for a 1700? My local VW shop has some of the Hall effect distributors, but for water cooled. Could I just rob the internals and swap them?

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1964 sunroof Beetle Restoration "Herbie"
“Joann” 1970 Elm Green Squareback
1972 Sierra Yellow Tin Top Westfalia Camper
“Fitz” 1971 Westfalia Poptop

[Chickensoup]

i would run a tuned header and use a diesel heater so your bus sounds like a jet/hotel room window AC

although a tuned merge header would absolutely make more power and be more efficient, idk how well those heaterboxes flow and if it would be worth it with your carb, cam, and head combo.
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-'85 c10 5.3 LS, 222 cam, long tubes, x pipe, 3 inch spin tech's
-'05 B5.5 TDI Wagon 17in sport rims ;EGR + BSM + ASV Delete, Stage-2 Tune, straight pipe
'65 Tourist Delivery Build
'66 RIP
'69 RIP
Hosea 4:6 "My people are destroyed for lack of knowledge"

[Clatter]

Major, Major score on both accounts!

Those heaters are just the ticket.
Get the Empi t-bird copy..

You'll likely need to pop for small venturies for those carbs.
What size valves did you end up with, again?
42 x 36? Then some 34 vents should be ideal.
IDF 44s usually have 36s, and you might just try those and see how they work.
If you have smaller valves.. Then that means smaller vents..


I still tell ya you should find a 2.0 crank/rod assembly somewhere...!
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Bus Motor Build

What’s That Noise?!?

[Chickensoup]

[raygreenwood]

[Chickensoup]

then i see no reason he cant have his current crank ground offset for the 2.0 throw. just need the 2.0 rods.
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-'85 c10 5.3 LS, 222 cam, long tubes, x pipe, 3 inch spin tech's
-'05 B5.5 TDI Wagon 17in sport rims ;EGR + BSM + ASV Delete, Stage-2 Tune, straight pipe
'65 Tourist Delivery Build
'66 RIP
'69 RIP
Hosea 4:6 "My people are destroyed for lack of knowledge"

[raygreenwood]

[Clatter]

Ya,
If you have access to some junk like our esteemed OP here,
The chances of finding a 2.0 crank/rods is pretty good.

Usually try to use a 1.7 for the case/heads/rockers/exhaust/tin,
And a 2.0 for the crank, rods and P&L.
Early cases and heads are higher quality and less likely to be roached.
Late crank and rods is a 'free' stroker setup.
The 1.7/1.8 is a significantly stronger crank, mostly due to more overlap from the larger rod journals,
But in a bus, it will never rev enough to make a difference.
Pushing a bus, stroke helps.


Yes,
You could take and have a 1.7/1.8 crank offset ground.
That's basically what the factory did.
But,
Dag,
Lot of cake to pack and ship it to DPR or someplace qualified.
Especially for something to be found lying in the back of a car or in a pile of motors or something at the junkyard.


The 2.0 takes a different piston (pin height) than the 1.7/1.8,
But you're usually going to be replacing P&L anyways..

A set of 1.7 heads on a 2.0 bottom end with 94 bus dished pistons makes for a nice little bump in compression, and a bit bigger valves, just right for a bus motor with a mild cam.
Same setup as the 'Cheap Junk' motor build in my sig..

If you have access to multiple core motors as we do,
It makes good sense to just pick the ones you want before starting the build.
As the 'wrong' parts will cost the same to do as the 'right' ones anyways.

Right?


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Bus Motor Build

What’s That Noise?!?

[Ceckert64]

They were definitely a score! The Weber’s are Italian ones, they are made in Bologna Italy, a great price! Thank you for the vent information. I feel very stupide for this but the guy had the specs written down for the carbs and I didn’t get a picture of the specs and don’t have the guy’s contact information

I Haven’t settled on any valves yet but I will probably do 42x36 for them.

2 liter or not to 2 liter, tis the question it’s tempting, but I have already bought NOS 1.7L pistons with rings and pins. A 1.7L crank that may not even need machining. And cylinders that may just need a hone. I will probably stay 1.7 but I could still be convinced though. Do you have to open up the case for the 2L cylinders? But I can definitely find a good 2L crank at the junkyard.

I will start putting a list of things to order together. I think it will do the empi T-bird copy, I’m thinking web 86 cam (would something else be better?) I need a double thrust cam bearing kit, possibly an engine gasket kit, I might actually have one already, look for electronic ignition parts.
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1964 sunroof Beetle Restoration "Herbie"
“Joann” 1970 Elm Green Squareback
1972 Sierra Yellow Tin Top Westfalia Camper
“Fitz” 1971 Westfalia Poptop

[calvinater]

Last i heard , Bologna is in Italy.
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"Albatross"!

[Ceckert64]

[67rustavenger]

[Ceckert64]

[raygreenwood]

[67rustavenger]

[orwell84]

Jeez...those heater boxes. Nice score. I have been fiddly welding a set of heater boxes for ages.

[Ceckert64]

Yesterday I got some more scores at the junkyard. I got a 2L crank and rods that seem to be in good shape, might not even need machining. I got an OG VW Hall effect distributor out of a wasser boxer engine. I got a bunch of carburetors and some other parts. One is an almost new coil that I believe is a resistance style for the Hall effect distributor. And a good T1 dual port head

_________________
1964 sunroof Beetle Restoration "Herbie"
“Joann” 1970 Elm Green Squareback
1972 Sierra Yellow Tin Top Westfalia Camper
“Fitz” 1971 Westfalia Poptop

[Chickensoup]

chambers look sand blasted.

Oh and thanks for picking up the carbs!
_________________
-'85 c10 5.3 LS, 222 cam, long tubes, x pipe, 3 inch spin tech's
-'05 B5.5 TDI Wagon 17in sport rims ;EGR + BSM + ASV Delete, Stage-2 Tune, straight pipe
'65 Tourist Delivery Build
'66 RIP
'69 RIP
Hosea 4:6 "My people are destroyed for lack of knowledge"

[Ceckert64]

I looked at the crank today, no scoring on it. But someone put two connecting rods backwards It’s definitely been rebuilt, I will check tomorrow to see if the crank is still standard or been machined. But I think the main bearings may have had STD on them… I will also check run-out on it. I think I’m going to go 2L or more. Got to have something that suits the carbs well, so I guess I have to go a little bigger
Notice all numbers on top

_________________
1964 sunroof Beetle Restoration "Herbie"
“Joann” 1970 Elm Green Squareback
1972 Sierra Yellow Tin Top Westfalia Camper
“Fitz” 1971 Westfalia Poptop

[Ceckert64]

Has anyone used this piston and cylinder set before? https://www.thesamba.com/vw/classifieds/detail.php?id=948299
The seller has great reviews but the price is amazing and just want to know if anyone knows the quality

TIA Aiden
_________________
1964 sunroof Beetle Restoration "Herbie"
“Joann” 1970 Elm Green Squareback
1972 Sierra Yellow Tin Top Westfalia Camper
“Fitz” 1971 Westfalia Poptop